package ext.opensource.netty.server.example.listen;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

@Component
public class SpringBeanUtil implements ApplicationContextAware {
	private static ApplicationContext applicationContext;

	@Override
	public void setApplicationContext(final ApplicationContext applicationContext) throws BeansException {
		System.err.println("SpringBeanUtil");
		SpringBeanUtil.applicationContext = applicationContext;
	}

	/**
	 * 获取applicationContext
	 * 
	 * @return
	 */
	public static ApplicationContext getApplicationContext() {
		return SpringBeanUtil.applicationContext;
	}

	/**
	 * 通过name获取 Bean.
	 * 
	 * @param name
	 * @return
	 */
	public static Object getBean(final String name) {
		return SpringBeanUtil.getApplicationContext().getBean(name);
	}

	/**
	 * 通过class获取Bean.
	 * 
	 * @param clazz
	 * @return
	 */
	public static <T> T getBean(final Class<T> clazz) {
		try {
			return SpringBeanUtil.getApplicationContext().getBean(clazz);
		} catch (final Exception ex) {
			return null;
		}
	}

	/**
	 * 通过name,以及Clazz返回指定的Bean
	 * 
	 * @param name
	 * @param clazz
	 * @return
	 */
	public static <T> T getBean(final String name, final Class<T> clazz) {
		return SpringBeanUtil.getApplicationContext().getBean(name, clazz);
	}

}
